jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
long max_bytes_needed, long already_allocated)
{
long limit = cinfo->mem->max_memory_to_use - already_allocated;
__boundcheck_metadata_store((void *)(&limit),(void *)((size_t)(&limit)+sizeof(limit)*8-1));
long slop;
__boundcheck_metadata_store((void *)(&slop),(void *)((size_t)(&slop)+sizeof(slop)*8-1));
long mem;
__boundcheck_metadata_store((void *)(&mem),(void *)((size_t)(&mem)+sizeof(mem)*8-1));
/* Don't ask for more than what application has told us we may use */
if (max_bytes_needed > limit && limit > 0)
max_bytes_needed = limit;
/* Find whether there's a big enough free block in the heap.
* CompactMem tries to create a contiguous block of the requested size,
* and then returns the size of the largest free block (which could be
* much more or much less than we asked for).
* We add some slop to ensure we don't use up all available memory.
*/
slop = max_bytes_needed / 16 + 32768L;
mem = CompactMem(max_bytes_needed + slop) - slop;
if (mem < 0)
mem = 0; /* sigh, couldn't even get the slop */
/* Don't take more than the application says we can have */
if (mem > limit && limit > 0)
mem = limit;
return mem;
}
void free_and_unlock_memory(void)
{
SoundManager::instance()->StopAllSounds();
#ifdef mac
PurgeMem(maxSize);
CompactMem(maxSize);
#endif
}
